The Piel Emeraude is a low wing monoplane designed in France by Claude Piel in the 1950s as a two-seater, semi-aerobatic, sports and touring aircraft. The aircraft was widely built both by factories and homebuilders. The A1R Piel Emeraude is homebuilt version with classic avionics systems such as KAP-150 autopilot and KX-165 VHF Radio.

The fuselage is of conventional wooden construction with a combination plywood and fabric covering. The wing is comprised of a single one piece laminated wooden spar with a moulded plywood leading edge forming a torsion box, completed in conventional fashion with wooden ribs and fabric covering aft from the torsional box.